RTCRtpSender

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2018.

* Some parts of this feature may have varying levels of support.

See full compatibility

The RTCRtpSender interface provides the ability to control and obtain details about how a particular MediaStreamTrack is encoded and sent to a remote peer.

With it, you can configure the encoding used for the corresponding track, get information about the device's media capabilities, and so forth. You can also obtain access to an RTCDTMFSender which can be used to send DTMF codes (to simulate the user pressing buttons on a telephone's dial pad) to the remote peer.

Instance properties

RTCRtpSender.dtmf Read only: An RTCDTMFSender which can be used to send DTMF tones using telephone-event payloads on the RTP session represented by the RTCRtpSender object. If null, the track and/or the connection doesn't support DTMF. Only audio tracks can support DTMF.
RTCRtpSender.track Read only: The MediaStreamTrack which is being handled by the RTCRtpSender. If track is null, the RTCRtpSender doesn't transmit anything.
RTCRtpSender.transport Read only: The RTCDtlsTransport over which the sender is exchanging the RTP and RTCP packets used to manage transmission of media and control data. This value is null until the transport is established. When bundling is in use, more than transceiver may be sharing the same transport object.
RTCRtpSender.transform: An RTCRtpScriptTransform is used to insert a transform stream (TransformStream) running in a worker thread into the sender pipeline, allowing stream transforms to be applied to encoded video and audio frames after they are output by a codec, and before they are sent.

Obsolete properties

rtcpTransport: This property has been removed; the RTP and RTCP transports have been combined into a single transport. Use the transport property instead.

Static methods

RTCRtpSender.getCapabilities(): Returns an object describing the system's capabilities for sending a specified kind of media data.

Instance methods

RTCRtpSender.getParameters(): Returns an object describing the current configuration for the encoding and transmission of media on the track.
RTCRtpSender.getStats(): Returns a Promise which is fulfilled with a RTCStatsReport which provides statistics data for all outbound streams being sent using this RTCRtpSender.
RTCRtpSender.setParameters(): Applies changes to parameters which configure how the track is encoded and transmitted to the remote peer.
RTCRtpSender.setStreams(): Sets the stream(s) associated with the track being transmitted by this sender.
RTCRtpSender.replaceTrack(): Attempts to replace the track currently being sent by the RTCRtpSender with another track, without performing renegotiation. This method can be used, for example, to toggle between the front- and rear-facing cameras on a device.

Specifications

Specification
WebRTC: Real-Time Communication in Browsers # rtcrtpsender-interface

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`RTCRtpSender`	Chrome – Full support Chrome 64 (Release date: 2018-01-23) footnote Full support	Edge – Full support Edge 13 (Release date: 2015-11-12) footnote Full support	Firefox – Full support Firefox 34 (Release date: 2014-12-01) footnote Full support	Opera – Full support Opera 51 (Release date: 2018-02-07) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 64 (Release date: 2018-01-23) footnote Full support	Firefox for Android – Full support Firefox for Android 34 (Release date: 2014-12-01) footnote Full support	Opera Android – Full support Opera Android 47 (Release date: 2018-07-23) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 9 (Release date: 2018-09-15) footnote Full support	WebView Android – Full support WebView Android 64 (Release date: 2018-01-23) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`createEncodedStreams`	Chrome – Full support Chrome 86 (Release date: 2020-10-20) footnote Full support	Edge – Full support Edge 86 (Release date: 2020-10-09) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 72 (Release date: 2020-10-21) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 86 (Release date: 2020-10-20) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 61 (Release date: 2020-12-07) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 14 (Release date: 2021-04-17) footnote Full support	WebView Android – Full support WebView Android 86 (Release date: 2020-10-20) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`dtmf`	Chrome – Full support Chrome 66 (Release date: 2018-04-17) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 52 (Release date: 2017-03-07) footnote Full support	Opera – Full support Opera 53 (Release date: 2018-05-10) footnote Full support	Safari – Full support Safari 13.1 (Release date: 2020-03-24) footnote Full support	Chrome Android – Full support Chrome Android 66 (Release date: 2018-04-17) footnote Full support	Firefox for Android – Full support Firefox for Android 52 (Release date: 2017-03-07) footnote Full support	Opera Android – Full support Opera Android 47 (Release date: 2018-07-23) footnote Full support	Safari on iOS – Full support Safari on iOS 13.4 (Release date: 2020-03-24) footnote Full support	Samsung Internet – Full support Samsung Internet 9 (Release date: 2018-09-15) footnote Full support	WebView Android – Full support WebView Android 66 (Release date: 2018-04-17) footnote Full support	WebView on iOS – Full support WebView on iOS 13.4 (Release date: 2020-03-24) footnote Full support
`getCapabilities()` static method	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 13 (Release date: 2015-11-12) footnote Full support	Firefox – Full support Firefox 113 (Release date: 2023-05-09) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Full support Firefox for Android 113 (Release date: 2023-05-09) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`getParameters()`	Chrome – Full support Chrome 68 (Release date: 2018-07-24) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 46 (Release date: 2016-04-26) footnote Full support	Opera – Full support Opera 55 (Release date: 2018-08-16) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 68 (Release date: 2018-07-24) footnote Full support	Firefox for Android – Full support Firefox for Android 46 (Release date: 2016-04-26) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 68 (Release date: 2018-07-24) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`codecs` property in returned object	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Partial support Firefox 46 – 127 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used. Firefox – Full support Firefox 128 (Release date: 2024-07-09) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Partial support Firefox for Android 46 – 127 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used. Firefox for Android – Full support Firefox for Android 128 (Release date: 2024-07-09) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`degradationPreference` property in returned object	Chrome – Full support Chrome 83 (Release date: 2020-05-19) footnote Full support	Edge – Full support Edge 83 (Release date: 2020-05-21) footnote Full support	Firefox – Full support Firefox 138 (Release date: 2025-04-29) footnote Full support	Opera – Full support Opera 69 (Release date: 2020-06-24) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 83 (Release date: 2020-05-19) footnote Full support	Firefox for Android – Full support Firefox for Android 138 (Release date: 2025-04-29) footnote Full support	Opera Android – Full support Opera Android 59 (Release date: 2020-06-30) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 13 (Release date: 2020-12-02) footnote Full support	WebView Android – Full support WebView Android 83 (Release date: 2020-05-19) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`encodings` property in returned object	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 46 (Release date: 2016-04-26) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Full support Firefox for Android 46 (Release date: 2016-04-26) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`headerExtensions` property in returned object	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Partial support Firefox 46 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used.	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Partial support Firefox for Android 46 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used.	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`rtcp` property in returned object	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Partial support Firefox 46 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used.	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 15 (Release date: 2021-09-20) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Partial support Firefox for Android 46 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used.	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 15 (Release date: 2021-09-20) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 15 (Release date: 2021-09-20) footnote Full support
`transactionId` property in returned object	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 110 (Release date: 2023-02-14) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Full support Firefox for Android 110 (Release date: 2023-02-14) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`getStats()`	Chrome – Full support Chrome 67 (Release date: 2018-05-29) footnote Full support	Edge – Full support Edge 13 (Release date: 2015-11-12) footnote Full support	Firefox – Full support Firefox 55 (Release date: 2017-08-08) footnote Full support	Opera – Full support Opera 54 (Release date: 2018-06-28) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 67 (Release date: 2018-05-31) footnote Full support	Firefox for Android – Full support Firefox for Android 55 (Release date: 2017-08-08) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 9 (Release date: 2018-09-15) footnote Full support	WebView Android – Full support WebView Android 67 (Release date: 2018-05-31) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`replaceTrack()`	Chrome – Full support Chrome 65 (Release date: 2018-03-06) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 34 (Release date: 2014-12-01) footnote Full support	Opera – Full support Opera 52 (Release date: 2018-03-22) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 65 (Release date: 2018-03-06) footnote Full support	Firefox for Android – Full support Firefox for Android 34 (Release date: 2014-12-01) footnote Full support	Opera Android – Full support Opera Android 47 (Release date: 2018-07-23) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 9 (Release date: 2018-09-15) footnote Full support	WebView Android – Full support WebView Android 65 (Release date: 2018-03-06) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`rtcpTransport` Deprecated	Chrome – Full support Chrome 75 (Release date: 2019-06-04) footnote Full support	Edge – Full support Edge 13 (Release date: 2015-11-12) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 62 (Release date: 2019-06-27) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 75 (Release date: 2019-06-04) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 54 (Release date: 2019-10-18) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 11 (Release date: 2019-12-05) footnote Full support	WebView Android – Full support WebView Android 75 (Release date: 2019-06-04) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`setParameters()`	Chrome – Full support Chrome 68 (Release date: 2018-07-24) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Partial support Firefox 46 – 63 (Release date: 2016-04-26) footnote Partial support footnote Before Firefox 64, changes to parameters that should update live would not do so. Firefox – Full support Firefox 64 (Release date: 2018-12-11) footnote Full support	Opera – Full support Opera 55 (Release date: 2018-08-16) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 68 (Release date: 2018-07-24) footnote Full support	Firefox for Android – Partial support Firefox for Android 46 – 63 (Release date: 2016-04-26) footnote Partial support footnote Before Firefox for Android 64, changes to parameters that should update live would not do so. Firefox for Android – Full support Firefox for Android 64 (Release date: 2018-12-11) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 68 (Release date: 2018-07-24) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`parameters.codecs` parameter	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Partial support Firefox 46 – 127 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used. Firefox – Full support Firefox 128 (Release date: 2024-07-09) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Partial support Firefox for Android 46 – 127 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used. Firefox for Android – Full support Firefox for Android 128 (Release date: 2024-07-09) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`parameters.degradationPreference` parameter	Chrome – Full support Chrome 83 (Release date: 2020-05-19) footnote Full support	Edge – Full support Edge 83 (Release date: 2020-05-21) footnote Full support	Firefox – Full support Firefox 138 (Release date: 2025-04-29) footnote Full support	Opera – Full support Opera 69 (Release date: 2020-06-24) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 83 (Release date: 2020-05-19) footnote Full support	Firefox for Android – Full support Firefox for Android 138 (Release date: 2025-04-29) footnote Full support	Opera Android – Full support Opera Android 59 (Release date: 2020-06-30) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 13 (Release date: 2020-12-02) footnote Full support	WebView Android – Full support WebView Android 83 (Release date: 2020-05-19) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`maintain-framerate-and-resolution` value Experimental	Chrome – Full support Chrome 144 (Release date: 2026-01-13) footnote Full support	Edge – Full support Edge 144 (Release date: 2026-01-21) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 128 (Release date: 2026-02-26) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 144 (Release date: 2026-01-13) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 95 (Release date: 2026-02-11) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – No support Samsung Internet footnote No support	WebView Android – Full support WebView Android 144 (Release date: 2026-01-13) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`parameters.encodings` parameter	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 46 (Release date: 2016-04-26) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Full support Firefox for Android 46 (Release date: 2016-04-26) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`parameters.encodings.active` parameter	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 110 (Release date: 2023-02-14) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 11.1 (Release date: 2018-04-12) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Full support Firefox for Android 110 (Release date: 2023-02-14) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 11.3 (Release date: 2018-03-29) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 11.3 (Release date: 2018-03-29) footnote Full support
`parameters.encodings.codec` parameter	Chrome – Full support Chrome 119 (Release date: 2023-10-31) footnote Full support	Edge – Full support Edge 119 (Release date: 2023-11-02) footnote Full support	Firefox – Full support Firefox 142 (Release date: 2025-08-19) footnote Full support	Opera – Full support Opera 105 (Release date: 2023-11-14) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 119 (Release date: 2023-10-31) footnote Full support	Firefox for Android – Full support Firefox for Android 142 (Release date: 2025-08-19) footnote Full support	Opera Android – Full support Opera Android 79 (Release date: 2023-12-06) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 25 (Release date: 2024-04-24) footnote Full support	WebView Android – Full support WebView Android 119 (Release date: 2023-10-31) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`parameters.encodings.dtx` parameter Deprecated Non-standard	Chrome – No support Chrome footnote No support	Edge – No support Edge footnote No support	Firefox – No support Firefox footnote No support	Opera – No support Opera footnote No support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – No support Chrome Android footnote No support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – No support Opera Android footnote No support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – No support Samsung Internet footnote No support	WebView Android – No support WebView Android footnote No support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`parameters.encodings.maxBitrate` parameter	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 46 (Release date: 2016-04-26) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Full support Firefox for Android 46 (Release date: 2016-04-26) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`parameters.encodings.maxFramerate` parameter	Chrome – Full support Chrome 81 (Release date: 2020-04-07) footnote Full support	Edge – Full support Edge 81 (Release date: 2020-04-13) footnote Full support	Firefox – Partial support Firefox 101 (Release date: 2022-05-31) footnote Partial support footnote Zero is treated as 'no fps limit' (see bug 1611957).	Opera – Full support Opera 68 (Release date: 2020-04-22) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 81 (Release date: 2020-04-07) footnote Full support	Firefox for Android – Partial support Firefox for Android 101 (Release date: 2022-05-31) footnote Partial support footnote Zero is treated as 'no fps limit' (see bug 1611957).	Opera Android – Full support Opera Android 58 (Release date: 2020-05-13) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 13 (Release date: 2020-12-02) footnote Full support	WebView Android – Full support WebView Android 81 (Release date: 2020-04-07) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`parameters.encodings.priority` parameter	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 46 (Release date: 2016-04-26) footnote footnote In version 110 and later the default priority is `low`.	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Full support Firefox for Android 46 (Release date: 2016-04-26) footnote footnote In version 110 and later the default priority is `low`.	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`parameters.encodings.rid` parameter	Chrome – No support Chrome footnote No support	Edge – No support Edge footnote No support	Firefox – Full support Firefox 46 (Release date: 2016-04-26) footnote Full support	Opera – No support Opera footnote No support	Safari – No support Safari footnote No support	Chrome Android – No support Chrome Android footnote No support	Firefox for Android – Full support Firefox for Android 46 (Release date: 2016-04-26) footnote Full support	Opera Android – No support Opera Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – No support Samsung Internet footnote No support	WebView Android – No support WebView Android footnote No support	WebView on iOS – No support WebView on iOS footnote No support
`parameters.encodings.scaleResolutionDownBy` parameter	Chrome – Full support Chrome 74 (Release date: 2019-04-23) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 46 (Release date: 2016-04-26) footnote Full support	Opera – Full support Opera 62 (Release date: 2019-06-27) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 74 (Release date: 2019-04-24) footnote Full support	Firefox for Android – Full support Firefox for Android 46 (Release date: 2016-04-26) footnote Full support	Opera Android – Full support Opera Android 53 (Release date: 2019-07-11) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 11 (Release date: 2019-12-05) footnote Full support	WebView Android – Full support WebView Android 74 (Release date: 2019-04-24) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`parameters.headerExtensions` parameter	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Partial support Firefox 46 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used.	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Partial support Firefox for Android 46 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used.	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`parameters.rtcp` parameter	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Partial support Firefox 46 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used.	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 15 (Release date: 2021-09-20) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Partial support Firefox for Android 46 (Release date: 2016-04-26) footnote Partial support footnote The property is defined but not implemented/used.	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 15 (Release date: 2021-09-20) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 15 (Release date: 2021-09-20) footnote Full support
`parameters.transactionId` parameter	Chrome – Full support Chrome 69 (Release date: 2018-09-04) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 110 (Release date: 2023-02-14) footnote Full support	Opera – Full support Opera 56 (Release date: 2018-09-25) footnote Full support	Safari – Full support Safari 12.1 (Release date: 2019-03-25) footnote Full support	Chrome Android – Full support Chrome Android 69 (Release date: 2018-09-04) footnote Full support	Firefox for Android – Full support Firefox for Android 110 (Release date: 2023-02-14) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 12.2 (Release date: 2019-03-25) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – Full support WebView Android 69 (Release date: 2018-09-04) footnote Full support	WebView on iOS – Full support WebView on iOS 12.2 (Release date: 2019-03-25) footnote Full support
`setStreams`	Chrome – Full support Chrome 76 (Release date: 2019-07-30) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 113 (Release date: 2023-05-09) footnote Full support	Opera – Full support Opera 63 (Release date: 2019-08-20) footnote Full support	Safari – Full support Safari 14.1 (Release date: 2021-04-26) footnote Full support	Chrome Android – Full support Chrome Android 76 (Release date: 2019-07-30) footnote Full support	Firefox for Android – Full support Firefox for Android 113 (Release date: 2023-05-09) footnote Full support	Opera Android – Full support Opera Android 54 (Release date: 2019-10-18) footnote Full support	Safari on iOS – Full support Safari on iOS 14.5 (Release date: 2021-04-26) footnote Full support	Samsung Internet – Full support Samsung Internet 12 (Release date: 2020-06-19) footnote Full support	WebView Android – Full support WebView Android 79 (Release date: 2019-12-17) footnote Full support	WebView on iOS – Full support WebView on iOS 14.5 (Release date: 2021-04-26) footnote Full support
`track`	Chrome – Full support Chrome 64 (Release date: 2018-01-23) footnote Full support	Edge – Full support Edge 13 (Release date: 2015-11-12) footnote Full support	Firefox – Full support Firefox 34 (Release date: 2014-12-01) footnote Full support	Opera – Full support Opera 51 (Release date: 2018-02-07) footnote Full support	Safari – Full support Safari 11 (Release date: 2017-09-19) footnote Full support	Chrome Android – Full support Chrome Android 64 (Release date: 2018-01-23) footnote Full support	Firefox for Android – Full support Firefox for Android 34 (Release date: 2014-12-01) footnote Full support	Opera Android – Full support Opera Android 47 (Release date: 2018-07-23) footnote Full support	Safari on iOS – Full support Safari on iOS 11 (Release date: 2017-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 9 (Release date: 2018-09-15) footnote Full support	WebView Android – Full support WebView Android 64 (Release date: 2018-01-23) footnote Full support	WebView on iOS – Full support WebView on iOS 11 (Release date: 2017-09-19) footnote Full support
`transform`	Chrome – Full support Chrome 141 (Release date: 2025-09-30) footnote Full support	Edge – Full support Edge 141 (Release date: 2025-10-03) footnote Full support	Firefox – Full support Firefox 117 (Release date: 2023-08-29) footnote Full support	Opera – Full support Opera 125 (Release date: 2025-12-04) footnote Full support	Safari – Full support Safari 15.4 (Release date: 2022-03-14) footnote Full support	Chrome Android – Full support Chrome Android 141 (Release date: 2025-09-30) footnote Full support	Firefox for Android – Full support Firefox for Android 117 (Release date: 2023-08-29) footnote Full support	Opera Android – Full support Opera Android 93 (Release date: 2025-11-25) footnote Full support	Safari on iOS – Full support Safari on iOS 15.4 (Release date: 2022-03-14) footnote Full support	Samsung Internet – No support Samsung Internet footnote No support	WebView Android – Full support WebView Android 141 (Release date: 2025-09-30) footnote Full support	WebView on iOS – Full support WebView on iOS 15.4 (Release date: 2022-03-14) footnote Full support
`transport`	Chrome – Full support Chrome 75 (Release date: 2019-06-04) footnote Full support	Edge – Full support Edge 13 (Release date: 2015-11-12) footnote Full support	Firefox – Full support Firefox 82 (Release date: 2020-10-20) footnote Full support	Opera – Full support Opera 62 (Release date: 2019-06-27) footnote Full support	Safari – Full support Safari 15.4 (Release date: 2022-03-14) footnote Full support	Chrome Android – Full support Chrome Android 75 (Release date: 2019-06-04) footnote Full support	Firefox for Android – Full support Firefox for Android 82 (Release date: 2020-10-20) footnote Full support	Opera Android – Full support Opera Android 54 (Release date: 2019-10-18) footnote Full support	Safari on iOS – Full support Safari on iOS 15.4 (Release date: 2022-03-14) footnote Full support	Samsung Internet – Full support Samsung Internet 11 (Release date: 2019-12-05) footnote Full support	WebView Android – Full support WebView Android 75 (Release date: 2019-06-04) footnote Full support	WebView on iOS – Full support WebView on iOS 15.4 (Release date: 2022-03-14) footnote Full support

Tip: you can click/tap on a cell for more information.

Full support: Full support
Partial support: Partial support
No support: No support
: Experimental. Expect behavior to change in the future.
: Non-standard. Check cross-browser support before using.
: Deprecated. Not for use in new websites.
: See implementation notes.
: Has more compatibility info.